<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>预加载</title>
</head>
<body>
    <div class="img-container">
        <img src="https://gitee.com/top_super/cloud-img/raw/master/loading.gif" alt="过渡图片加载失败">

    </div>
</body>
</html>